Malicious PDF — malware analysis report

Static analysis result for SHA-256 062612fb4f4615a2…

MALICIOUS

PDF

73.4 KB Created: 2021-07-22 20:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d73e7fca5ecbe9235e5758750dbd6a0b SHA-1: ab5a41cca56f1e0576a571b3f316f21ffdf8c3e0 SHA-256: 062612fb4f4615a2134c0a95c3fc5894b9198aa1c4a6728fc8ff785351c9cb22
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8910

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://keyflounge.nl/userfiles/file/bofipolaz.pdf In PDF document text
    • http://curry-box-deluxe.de/userfiles/file/zodirowokuragutudetikexax.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/in85dajh0ecbadono6m0qdl91o/8987791154.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/viretob.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/9661cd233088b35fa9df5610b7fcf276/zumuruzopu.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/35658f130e094cd850ab6ffcd89040bd/5512123957.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084d3e5d9155---gaxavodebegadesunitasug.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d949ff04a15---34522996130.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/f1ralq5mj7audcel45iluhukpn/jidijetutemesalig.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-19/20210519002619632352.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/95125917829.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/896208109.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/21273738055.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3e56f2ebf---nixuxazewumegazake.pdfIn PDF document text
    • https://soechi.net/userfiles/file/58877061601.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/gitegitepemixuxi.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/6112989560.pdfIn PDF document text
    • http://ciskmv.com/css/file/83287806817.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210627214645365910byvij.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/93339097885.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160da76567e228---lifofabenupogumerorowe.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b32c1e1c641---68501557825.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/38da946fb5e21ee51416480b45fd3428/84184833966.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb699882732---76408697542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=child+acting+out+after+visitationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF25 16432 bytes
SHA-256: 80369d0d779f5c1e79fb404c7f81f1a4fede142519788c88c6ce679d54785a31

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